An interval of one Celsius degree is equivalent to an interval of:
a. one Fahrenheit degree.
b. one kelvin.
c. 5/9 Fahrenheit degree.
d. 5/9 kelvin.
[Ques. 2] If the distance between two negative point charges is increased by a factor of three, the resultant potential energy is what factor times the initial potential energy?
a. 3
b. 9
c. 1/3
d. 1/9
[Ques. 3] 78F is how many degrees Celsius?
a. 26
b. 172
c. 34
d. 18
e. 51
[Ques. 4] If a doubly-ionized oxygen atom (O2) is accelerated from rest by going through a potential difference of 32 V, what will be the change in its kinetic energy?
a. 16 eV
b. 32 eV
c. 64 eV
d. 51 eV
e. none of the above
[Ques. 5] A substance is heated from 23C to 45C. What would the same incremental change be when registered in kelvins?
a. 22
b. 71.6
c. 295
d. 34
e. 28
[Ques. 6] When charge Q1 is placed at point P1, the resulting potential at point P is V1 . When Q2 is placed at point P2 after Q1 is in position at P1, the resulting potential at P becomes V2 . What is the potential at point P if charge Q1 is then removed?
a. V1 + V2
b. V1 V2
c. V2 V1
d. (V1 + V2)/2
[Ques. 7] Which best describes a system made up of ice, water and steam existing together?
a. absolute zero
b. triple point
c. ice point
d. steam point
[Ques. 8] Two particles, each of charge 2.5 1019 C, are 4.8 105 m apart. What is the change in potential energy if they are brought 2.4 105 m closer together? (ke = 8.99 109 Nm2/C2)
a. 1.2E23 J
b. 4.7E24 J
c. 2.3E16 J
d. 1.4E15 J
e. 2.9E20 J
[Ques. 9] What is the temperature of a system in thermal equilibrium with another system made up of ice and water at one atmosphere of pressure?
a. 0F
b. 273 K
c. 0 K
d. 100C
[Ques. 10] A point charge of +2.5 C is located at the origin of a coordinate system and a second point charge of 5.6 C is at x = 1.9 m. At what point on the x axis is the electrical potential zero?
a. +4.3 m
b. +5.3 m
c. +0.59 m
d. +11 m
e. +1.3 m
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